CN106129509B - A kind of integrated battery of charging-discharging controller - Google Patents

A kind of integrated battery of charging-discharging controller Download PDF

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Publication number
CN106129509B
CN106129509B CN201610496158.1A CN201610496158A CN106129509B CN 106129509 B CN106129509 B CN 106129509B CN 201610496158 A CN201610496158 A CN 201610496158A CN 106129509 B CN106129509 B CN 106129509B
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China
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charging
battery
voltage
charge
road
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CN201610496158.1A
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Chinese (zh)
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CN106129509A (en
Inventor
朴政国
郭裕祺
户永杰
李正熙
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北方工业大学
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/46Accumulators structurally combined with charging apparatus
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44Methods for charging or discharging
    • H01M10/441Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014Circuits for equalisation of charge between batteries
    • H02J7/0019Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007Regulation of charging or discharging current or voltage
    • H02J7/00711Regulation of charging or discharging current or voltage with introduction of pulses during the charging process
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

A kind of integrated battery of charging-discharging controller, including accumulator body, power main circuit, detection circuit, control circuit and display portion, it is characterized in that, power main circuit is with the high-frequency isolation type DC-DC circuit of multiple-channel output, it is formed based on two-way circuit of reversed excitation with some switch combinations, switching frequency uses high frequency, detection circuit mainly includes the voltage Ui to transformer primary side, electric current Ii, the cell voltage Ub1-Ub6 and battery temperature T of every road output are sampled, control circuit is handled with the signal of receiving test circuit and each switching tube is driven to open and turn off, in use, charge and discharge can carry out simultaneously, it is charged using positive negative pulse stuffing, charging and discharging state is determined using primary side current of transformer and secondary voltage, and temperature-compensating is carried out in charging.

Description

A kind of integrated battery of charging-discharging controller

Technical field

The present invention relates to charging-discharging controllers to integrate battery.

Background technique

Currently, no matter for any kind of battery, when practical application, need to be controlled its charging by charging-discharging controller And discharge condition.Concrete scheme is all to be carried out according to the battery of load selection variety classes and specification in series and parallel, further according to battery Concrete condition design its corresponding charging-discharging controller.No matter these controllers use what control algolithm, general needle Battery is integrally controlled, and it is battery balanced, prevent the considerations of the problems such as super-charge super-discharge at most refine to every piece it is packaged Battery.And battery and controller are mutually indepedent, the two are not regarded as an entirety and accounted for.

Battery and the mutually independent defect of its charging-discharging controller mainly have following three points:

For whole system, the type specification of battery is various currently on the market, this just makes setting for charging-discharging controller Meter needs to change as the case may be.Bad fast, good to the battery maintenance effect control of the low controller battery of use cost Device (BMS) poor compatibility at high cost, is only applicable to the battery of particular types and specification, has change in demand of the system to battery capacity Otherwise designed controller is just needed when change.And battery is separately designed inevitably that result in whole system too fat to move with controller Numerous and jumbled, stability is low, vulnerable to the influence of change of external conditions, while also bringing inconvenience to using.

For battery itself, the battery of monolith encapsulation is all by several small batteries with same size currently on the market What unit was connected in series, monolith battery is exactly a black box for peripheral control unit, and the state of internal each unit is not It can monitor also just uncontrollable.It, can the effect of relatively good control algolithm in the case where each cell cases cannot be taken into account It has a greatly reduced quality, terminates in advance service life so as to cause battery, practical is to improve cost in the long run.

For customer-side, many people can use accordingly due to lacking and conserve knowledge and cannot to play battery complete Performance.It is also contemplated that the problem of controlling after buying battery, time-consuming and laborious, economically unfriendly, effect is also not necessarily secure, It does not control or also has potential danger in the case that control effect is bad.

Summary of the invention

The purpose of the present invention is to propose to a kind of novel integrated electric power storages for being integrally formed charging-discharging controller and accumulators collection Pond, controller can carry out accurate charge and discharge control to each battery unit, it uses the positive and negative arteries and veins of high current of variable pulse width Punching charging, can be according to its charging of the Characteristics Control of battery itself to improve the charge acceptance of battery and shorten the charging time Electric current, voltage with electric discharge, charge or discharge cut-off may also display or communicatively output temperature and state (voltage, electricity Stream, state-of-charge etc.), can plug and play, it is not only easy to use, save space, and guarantee minimum unit battery also most Charge and discharge are carried out under excellent state, are remarkably improved service efficiency and the service life of battery.Integrated battery in practical applications without Need other operate or equipment can running of pumps in series parallel connection to meet system voltage and power requirement.

The technical scheme adopted by the invention is that:

A kind of integrated battery of charging-discharging controller, including accumulator body, power main circuit, detection circuit, control electricity Road and display portion, power main circuit with the high-frequency isolation type DC-DC circuit of multiple-channel output, based on two-way circuit of reversed excitation with Some switch combinations form, and switching frequency uses high frequency, and detection circuit mainly includes voltage Ui, the electric current to transformer primary side Ii, the cell voltage Ub1-Ub6 and battery temperature T of every road output are sampled, and control circuit is with the letter of receiving test circuit It number is handled and each switching tube is driven to open and turn off, in use, charge and discharge can carry out simultaneously, and use is positive and negative Pulse is charged, and determines charging and discharging state using primary side current of transformer and secondary voltage, and carry out temperature benefit in charging It repays.

Further, every road the output voltage 2V or 3V or so of power main circuit multiple-channel output, synchronous commutation type MOSFET is replaced For diode.

Further, it is charged using positive negative pulse stuffing.Early period battery charge acceptance it is higher when, using high current perseverance Current charge when preset charging voltage to be achieved, is converted to positive negative pulse stuffing charging, specific method be in each charge cycle, Immediately following one or more heavy-current discharge negative pulses after the positive pulse that charges, later followed by one section of intermittent time, battery charging is eliminated The polarity effect generated in the process, raises charge acceptance, to guarantee the possibility of next period large current charge.

Further, when positive pulse charges, transformer primary side power supply power supply, main switch conducting complementary with synchronous rectifier, Load negative pulse or when being discharged, energy of the transformer primary side load absorption from secondary side battery, main switch with it is synchronous whole The still complementary conducting of flow tube.

Further, it carries out during the charging process battery balanced twice.Specific method is, at the end of constant-current charging phase, Stop charging, detection compares each road cell voltage, determines the carrying capacity on each road;Start intermittent discharge later, it is anti-when charging at this time The synchronous rectification MOSFET of excitation circuit becomes primary side switch pipe, and original primary side switch pipe becomes synchronous rectifier;According to every road Specific carrying capacity determines the duty ratio of each way switch pipe (carrying capacity is excessive then using big space rate, so that carrying capacity will be reduced) Or the too low switching tube of carrying capacity is directly turned off, until carrying capacity is balanced when interval.The high current positive negative pulse stuffing charging stage terminates The positive negative pulse stuffing for applying fixed narrow spaces to battery afterwards carries out floating charging, and in floating charge interval, it is true to compare each road cell voltage for detection Determine carrying capacity and use equalization methods progress identical with constant-current phase is balanced, until charging terminates.

Further, it equally carries out during discharge battery balanced.Specific method is to pass through each road battery electricity of constant testing Pressure when such as the difference of each road voltage is more than balanced allowance, cuts down the duty of too small branch switch pipe to determine whether each road is balanced Than or the direct too low switching tube of shutdown carrying capacity, while increasing the duty ratio of other way switch pipes to supply the function being cut in Rate can make battery externally keep output constant during equalization discharge, to not influence user in this way until equilibrium terminates Use.

Charging-discharging controller of the present invention integrates battery, using variable pulse width large current pulse charging, improves the effect of battery Rate and service life, and the charging time is shortened relative to traditional charging modes;It is integrated to save space, also eliminate user The various many and diverse items that should be noted when using battery, all problems are all settled a dispute by the parties concerned themselves in integrated internal storage battery, are not required to Want manual operation;In addition, synchronous rectifier improves system effectiveness, user is without otherwise designed charge-discharge control circuit, section The time has been saved while energy.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings.

Attached drawing 1 is that charging-discharging controller integrates accumulator structure figure.

Attached drawing 2 is the whole topology of pulse charger

Attached drawing 3 is variable pulse width pulse charge schematic diagram

Attached drawing 4 is charging-discharging controller system program flow chart

Attached drawing 5 is positive pulse charging current simulation result (SOC:20%, 50%, 80%)

Attached drawing 6 is positive negative pulse charging current simulations result

Attached drawing 7 is battery balanced simulation result

Attached drawing 8 is active clamp simulation result

Specific embodiment

The present invention will be further described below in conjunction with the embodiments.

Embodiment 1

A kind of integrated battery of charging-discharging controller, including accumulator body, power main circuit, detection circuit, control electricity Road and display portion, power main circuit with the high-frequency isolation type DC-DC circuit of multiple-channel output, based on two-way circuit of reversed excitation with Some switch combinations form, and switching frequency uses high frequency, and detection circuit mainly includes voltage Ui, the electric current to transformer primary side Ii, the cell voltage Ub1-Ub6 and battery temperature T of every road output are sampled, and control circuit is with the letter of receiving test circuit It number is handled and each switching tube is driven to open and turn off, in use, charge and discharge can carry out simultaneously, and use is positive and negative Pulse is charged, and determines charging and discharging state using primary side current of transformer and secondary voltage, and carry out temperature benefit in charging It repays.

Power main circuit is opened based on two-way circuit of reversed excitation with some with the high-frequency isolation type DC-DC circuit of multiple-channel output The reason of pass is composed, and the use of flyback is main circuit is that its circuit structure is very simple, small in size, low in cost, performance is good Good and high reliablity, is especially advantageous for integrated, and the characteristics of it is capable of providing Multiple isolated outputs just may be implemented to each electricity The accurate control of pool unit.Meanwhile switching frequency uses high frequency to further decrease the volume of transformer.

Since every road output voltage of multiple-channel output is very low (2V or 3V or so), the conduction voltage drop of general-purpose diode is 0.7V, the smallest Schottky diode of conduction voltage drop also have 0.3V, and such as using diode rectification, there will be a large amount of power losses to exist On diode, therefore diode is substituted using synchronous commutation type MOSFET, conducting drain-source resistance maximum is only a few milliohms, big Also there was only minimum loss under charging current.At the same time, synchronous rectification MOSFET can also by control the conducting on each road with Shutdown is battery balanced between a battery unit to realize.In order to recycle, transformer leakage inductance energy improves controller efficiency, clamper becomes Depressor primary side switch pipe turn off when impulse voltage and realize that no-voltage is open-minded, while also be integrated consideration, reduce radiating surface Product is to reduce volume, using complementary type active clamp technology.

Further, every road the output voltage 2V or 3V or so of power main circuit multiple-channel output, synchronous commutation type MOSFET is replaced For diode.

Further, when positive pulse charges, transformer primary side power supply power supply, main switch conducting complementary with synchronous rectifier, Start when the difference in voltage for detecting every road battery is more than balanced allowance battery balanced, specific method is in specific electrical voltage point Synchronous rectifier is disconnected, restores conducting complementary with main switch again after when each branch voltage reaches preset value, loads negative arteries and veins When rushing or being discharged, transformer primary side is that load RL absorbs the energy from secondary side battery, main switch and synchronous rectifier Still complementary conducting, equally starts battery balanced, specific method when the difference in voltage for detecting every road battery is more than balanced allowance It is the duty ratio for cutting down too small branch rectifying tube, restores conducting complementary with main switch again after each branch carrying capacity is balanced.

The charging-discharging controller integrates the control that battery is accurately charged in the pulse of different state-of-charges Journey is as follows:

1) Ui, Ub1-Ub6, Ii and T are sampled after system initialization, and acquires the average value Ub of Ub1-Ub6, it is minimum Value Umin;If Ub is lower than the discharge cut-off voltage Ub.c of battery, discharge control switch S7, S8 are turned off, carries out over;

2) to judge whether each cell voltage is greater than with the difference of Umin if battery average voltage is greater than blanking voltage balanced Voltage, if more than road synchronous rectifier Sn is then turned off, to carry out battery balanced management, otherwise the road is in charged state, Synchronous rectifier conducting complementary with main switch;

3) during the charging process, if cell voltage Ub is less than preset voltage value Ub.set, constant current is carried out with high current and is filled Electricity carries out floating charging if Ub is greater than float charge voltage Uf with the burst pulse of fixed pulse width, if Ub is in Ub.set and float charge voltage Between Uf, then pulsewidth is calculated according to formula:

With the increase of battery charge amount, circuit is given with carrying out variable pulse width charging to battery to narrow current impulse by wide Battery applies the time of having a rest to suit the requirements, to improve charging by than improving charging by electric current, can break exponential curve certainly So receive the limitation of characteristic, realize quick charge and eliminate battery polarization effect, extends battery life;

4) while generating the charging pulse of needs under the conditions of different cell voltages, consider the influence of battery temperature, it is right The battery temperature T sampled carries out temperature-compensating;

5) since battery can show different external characteristics in the different charging stages with the difference of its carrying capacity, common The effect of PI closed-loop control is very unsatisfactory, therefore uses fuzzy self-tuning PID, and during on-line operation, control system is logical It crosses the result treatment to fuzzy logic ordination, table look-up and operation, complete the self-tuing on line to pid parameter, to realize to not Pulse with state-of-charge carries out accurate charge control.

The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and Within principle, any modification, equivalent replacement, improvement and so on should be included in protection of the invention.

Claims (4)

1. a kind of charging-discharging controller integrates battery, including accumulator body, power main circuit, detection circuit, control circuit And display portion, which is characterized in that power main circuit is with the high-frequency isolation type DC-DC circuit of multiple-channel output, two-way flyback electricity It is formed based on road with some switch combinations, using HF switch frequency, detection circuit mainly includes to transformer primary side Voltage Ui, electric current Ii, the cell voltage Ub1-Ub6 and battery temperature T that every road exports are sampled, and control circuit is to receive inspection The signal of slowdown monitoring circuit is handled and each switching tube is driven to open and turn off, in use, charge and discharge can simultaneously into Row determines charging and discharging state using primary side current of transformer and secondary voltage, and carries out temperature-compensating, the main electricity of power in charging Every road output voltage 2V or 3V of road multiple-channel output or so, synchronous commutation type MOSFET substitute diode, during the charging process into Row is battery balanced twice, and specific method is, at the end of constant-current charging phase, stops charging, and detection compares each road cell voltage, Determine the carrying capacity on each road;Start intermittent discharge later, the synchronous rectification MOSFET of circuit of reversed excitation becomes primary side when charging at this time Switching tube, original primary side switch pipe become synchronous rectifier;Accounting for for each way switch pipe is determined according to the specific carrying capacity in every road Sky ratio directly turns off the too low switching tube of carrying capacity, and carrying capacity is excessive then using big space rate, so that carrying capacity will be reduced, directly Carrying capacity is balanced when to interval, applies the positive negative pulse stuffing of fixed narrow spaces after the high current positive negative pulse stuffing charging stage to battery Floating charging is carried out, each road cell voltage of detection comparison determines carrying capacity in floating charge interval and use is identical with constant-current phase Weighing apparatus method carries out equilibrium, until charging terminates, the charging-discharging controller integrates battery in the pulse of different state-of-charges The control process accurately to be charged is as follows:
1) Ui after system initialization, Ub1-Ub6, Ii and T are sampled, and acquire the average value Ub of Ub1-Ub6, minimum value Umin;If Ub is lower than the discharge cut-off voltage Ub.c of battery, circuit is out of service, carries out over;
2) judge whether the difference of each cell voltage and Umin are greater than equalizing voltage if battery average voltage is greater than blanking voltage, If more than road synchronous rectifier Sn is then turned off, to carry out battery balanced management, otherwise the road is in charged state, synchronizes whole Flow tube conducting complementary with main switch;
3) during the charging process, if cell voltage Ub is less than preset voltage value Ub.set, constant-current charge is carried out with high current, if Ub is greater than float charge voltage Uf, then floating charging is carried out with the positive and negative burst pulse of fixed pulse width, if Ub is in Ub.set and float charge voltage Between Uf, then positive pulse pulsewidth is calculated according to formula:
,
Tp is charge cycle in formula, and Tc is charging pulse width, and k indicates that current charge cycle, k-1 are last charge cycle, Ub, f are battery floating charge pressure, and Ub, set are battery impulse charging starting voltage,
With the increase of battery charge amount, circuit gives battery to carry out variable pulse width charging to battery to narrow current impulse by wide Apply the time of having a rest to suit the requirements, to improve charging by than improving charging by electric current, exponential curve can be broken and connect naturally It is limited by characteristic, realize quick charge and eliminates battery polarization effect, extend battery life;
4) while generating the charging pulse of needs under the conditions of different cell voltages, the influence of battery temperature is considered, to sampling The battery temperature T arrived carries out temperature-compensating, and the pulsewidth for cutting down charging pulse is increased with temperature;
5) since battery can show different external characteristics in the different charging stages with the difference of its carrying capacity, common PI is closed The effect of ring control is very unsatisfactory, therefore uses fuzzy self-tuning PID, during on-line operation, control system by pair The result treatment of fuzzy logic ordination is tabled look-up and operation, and the self-tuing on line to pid parameter is completed, to realize to different lotuses The pulse of electricity condition carries out accurate charge control.
2. charging-discharging controller according to claim 1 integrates battery, charged using positive negative pulse stuffing, in electricity early period When the charge acceptance in pond is higher, using high current constant-current charge, when preset charging voltage to be achieved, positive negative pulse stuffing is converted to Charging, specific method are in each charge cycle, immediately following one or more heavy-current discharge negative pulses after the positive pulse that charges, later Followed by one section of intermittent time, the polarity effect generated in battery charging process is eliminated, charge acceptance is raised, it is next to guarantee The possibility of period large current charge.
3. charging-discharging controller according to claim 1 integrates battery, which is characterized in that when positive pulse charges, transformation Device primary side power supply power supply, main switch conducting complementary with synchronous rectifier, when loading negative pulse or being discharged, transformer primary side Energy of the load absorption from secondary side battery, the still complementary conducting of main switch and synchronous rectifier.
4. charging-discharging controller according to claim 1 integrates battery, which is characterized in that during discharge equally into Row is battery balanced, and specific method is to determine whether each road is balanced by each road cell voltage of constant testing, such as each road voltage When difference is more than balanced allowance, cuts down the duty ratio of too small branch switch pipe or directly turn off the too low switching tube of carrying capacity, together The duty ratio of other way switch pipes of Shi Zeng great, until equilibrium terminates, can make battery discharge in this way to supply the power being cut in Externally keep output constant in balanced process, to not influence the use of user.
CN201610496158.1A 2016-06-28 2016-06-28 A kind of integrated battery of charging-discharging controller CN106129509B (en)

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CN108417917B (en) * 2018-01-10 2020-07-24 中山大学 Quick charging method for lithium ion battery
CN108448186A (en) * 2018-01-30 2018-08-24 安徽省金屹电源科技有限公司 A kind of base station battery manager control panel
RU2696018C1 (en) * 2018-12-14 2019-07-30 Константин Иванович Тюхтин Method for recovery of accumulator battery
CN109802191A (en) * 2019-02-27 2019-05-24 苏州浪潮智能科技有限公司 A kind of charging method, system, device and the server of battery group

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